US3665916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter type semiconductor radiation detector
Assignee: Toshiba Corp
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Filing: 1969-08-28
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Granted: 1972-05-30
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Expires: 1989-08-28
Abstract
Abstract A catheter type semiconductor radiation detector comprising a semiconductor element introduced into a living body for detecting radiation prevailing therein wherein there is provided a movable retractable needle for fixing the detecting element at a prescribed position in the living body.
Inventors
- 👤 Tetsuji Kobayashi
- 👤 Tetsuo Sasaki
- 👤 Seiichi Takayanagi
- 👤 Toru Sugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:58
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/02; A61M25/04; A61B; A61B6/00; A61B6/40; A61B6/4057; A61B6/42; A61B6/4208; A61B6/425; A61B6/4258; A61M25/0105; A61M25/0108; H; H10; H10F; H10F99/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
A catheter type semiconductor radiation detector comprising: a detecting element having at least two electrodes and which is adapted to be introduced into a living body to detect radiation prevailing therein; a metal holder, one part of which is connected to one of said electrodes and which supports said detecting element; a flexible coaxial line comprising an external conductor connected to another part of the holder, and a central conductor connected to the other electrode of said detecting element, for providing electrical connection for said detecting element outside of the living body; a needle, movable relative to said metal holder, adapted for fixing the detecting element at a prescribed position in the living body; and means coupled to said needle for selectively moving said needle relative to said holder to selectively cause said needle to project and not to project from a surface of said radiation detector.
Claim 2
Dependent Claim
147 words
A catheter type semiconductor radiation detector comprising: a detecting element having at least two electrodes and which is adapted to be introduced into a living body to detect radiation prevailing therein; a metal holder, one part of which is connected to one of said electrodes and which supports said detecting element; a flexible coaxial line comprising an external conductor connected to another part of the holder, and a central conductor connected to the other electrode of said detecting element, for providing electrical connection for said detecting element outside of the living body; a needle, movable relative to said metal holder, adapted for fixing the detecting element at a prescribed position in the living body; and means coupled to said needle for selectively moving said needle relative to said holder to selectively cause said needle to project and not to project from a surface of said radiation detector.
Claim 3
Dependent Claim
89 words
The radiation detector according to claim 1 wherein the metal holder is perforated with a through hole, and wherein said moving means includes a flexible filament movably mounted in said through hole, said fixing needle being connected to the one end of said flexible filament nearest said detecting element, the other end of said flexible filament extending outside of said detector, whereby said fixing needle is selectively moved into said through hole by operating said other end of said flexible filament, and moved to project from said through hole.
Claim 4
Dependent Claim
39 words
The radiation detector according to claim 2 wherein said detecting element is positioned at a portion of said metal holder on the longitudinal side of said radiation detector and said through hole is perforated beginning on said longitudinal side.
Claim 5
Dependent Claim
41 words
The radiation detector according to claim 2 wherein said detecting element is disposed at one end of said radiation detector in its longitudinal direction and said through hole is perforated starting with said one end in parallel to the longitudinal direction.
Claim 6
Dependent Claim
71 words
The radiation detector according to claim 1 wherein said moving means includes an outer cylindrical metal casing slidable along the outside of the coaxial line, said fixing needle being coupled to the end of said outer cylindrical metal casing located nearest said detecting element, said fixing needle being moved from the detecting plane into the interior of said radiation detector by selectively sliding said metal casing relative to said coaxial line.
Claim 7
Dependent Claim
27 words
The radiation detector according to claim 5 wherein said outer cylindrical metal casing slides by operating the opposite end of the metal casing to the detecting element.
Claim 8
Dependent Claim
62 words
The radiation detector according to claim 5 wherein said moving means includes a flexible filament in the outer cylindrical metal casing, said flexible filament being drawn out through a penetrating hole in said metal casing to the outside of the detector, said drawn out end of said flexible filament being operated to selectively slide said metal casing relative to said coaxial line.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |